Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3e72197be53882…

MALICIOUS

PDF

71.7 KB Created: 2021-09-17 08:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7bd9553b3a01fba5d58bf39643e3ee5 SHA-1: 29d76fbffb40d4f2a9f21a058be0a2b5ac3651e7 SHA-256: 0d3e72197be53882a472724433d490402ede584cf7d565560d3516a998a6dace
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to obfuscate the malicious links or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ketchas.ru/uplcv?utm_term=patel+%26+patel+gujarati+grammar+pdf
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/tifenigob.pdf
    • http://1yunnan.com/ckfinder/userfiles/files/75590558461.pdf
    • http://tomei4x4.jp/js/upload/files/60818481151.pdf
    • http://annabarons.lv/files/files/69318481871.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16136ccc6c7fae---92112092381.pdf
    • http://studiotecnicomartani.eu/userfiles/files/ruvuravobelimed.pdf
    • http://pm-property.pl/userfiles/file/powabipineto.pdf
    • https://verner.lt/images/files/20041416812.pdf
    • https://ewt.cz/res/file/22588429518.pdf
    • https://delta-relay.be/userfiles/file/gurizufa.pdf
    • https://mbzl-pro.xyz/web/img/podborky/files/23562639455.pdf
    • http://1544-7419.net/upload/fckeditor/file/jukorefotunomavi.pdf
    • http://hurtmar.pl/Upload/file/39456754914.pdf
    • http://gtlfuelmarine.com/userfiles/file/pozediwone.pdf
    • http://e-kva.ru/admin/ckfinder/userfiles/files/medesavuvomuri.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144090e933c6---fajozabawula.pdf
    • https://telewebmarketing.com/FCKeditor/file/danirotowebasovi.pdf
    • https://cvsc.co/userfiles/file/zorilogofuroremasuz.pdf
    • http://speckrepej.com/upload/file/14860627878.pdf
    • https://matteagianotti.ch/userfiles/files/gosekuzofuwuvemerorivube.pdf
    • https://heatingboiler.ca/fck_upload/file/7941106925.pdf
    • http://tokyosushilohaus.com/uploads/files/bizug.pdf
    • http://vyveva.eu/UserFiles/File/botubojeb.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/161344c1c5fc96---pemubirexoforitigaru.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9d0.bin
dc39bd8cf8bb87f78311a0658ea181a393f28f2c78db4c9728913a91ea8e2d01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D0 9512 bytes
font_01_sfnt_off0000ce5c.bin
418ad97537a1ccd684bd920d74394d617503acc7ce2e29a4413bd4c78b0d23e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5C 17020 bytes
font_02_sfnt_off0000f9e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E9 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.